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Deep groove ball bearings consist of an outer ring, an inner ring, and a cage that holds a set of balls between them. The grooves in the inner and outer rings create a path for the balls to roll, allowing for smooth rotation. These bearings are designed with a narrow raceway, which provides stability and allows for high speed operation.

One of the primary uses of spherical roller bearings is in heavy machinery such as excavators, cranes, and other construction equipment. The spherical shape of the rollers allows for greater contact area between the bearing and the raceway, distributing the load more evenly and reducing stress on the bearing components. This results in longer service life and reduced maintenance requirements, which is essential in heavy machinery applications where downtime can be costly.

Moreover, the rubber seals (2RS) add a slight increase to the overall width, providing additional protection to the bearing's internal components. These seals not only improve the bearing's lifespan but also minimize lubricant loss, making the 6303-2RS ideal for applications where maintenance intervals need to be extended.